there is a thing called a Vial of Life, you can usually get them at hospitals, town halls, MD offices. It's a small cylinder, you fill in all your vital info, including a copy of your health care proxy, any advance directives and a med list. You stick a sticker on your front door to alert EMS that you have one, then a sticker on your fridge to tell them it is inside.
These are small enough for a woman to carry in her purse. A man could shrink the docs down small enough to fit in this wallet possibly. Or even have it in your glove box and put a sticker on the glove box.